More robust check for multiple integer indices in numba ravel_multidimensional_idx rewrites

[ricardoV94]

Closes #1132

The rewrite is not supposed to apply in the case behind the described bug. It was not accounting for uint integer indices, only signed ones :)

Separately but importantly, to run in pure Numba mode in this model we would need to address #1138

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82.12%. Comparing base (83c6b44) to head (0787243).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1139      +/-   ##
==========================================
- Coverage   82.12%   82.12%   -0.01%     
==========================================
  Files         185      185              
  Lines       48130    48130              
  Branches     8669     8669              
==========================================
- Hits        39527    39525       -2     
- Misses       6438     6439       +1     
- Partials     2165     2166       +1     

Files with missing lines	Coverage Δ
pytensor/tensor/rewriting/subtensor.py	90.25% <100.00%> (-0.22%)	⬇️